PerthGloryfan From Australia, joined Oct 2000, 751 posts, RR: 0
Reply 5, posted (13 years 9 months 1 week 16 hours ago) and read 2433 times:
The original Boeing 707 base versions offered to customers were:
707-320 (don't know what happened to -220)
which is where the Boeing house code of 20 originates.
Pan Am's 707s, being the first customer, were therefore the -121 (120+1) and -321 (320+1).
Qantas, the 18th customer, had -138 (120+18) and -338.
With the 727, and subsequent models however, the base versions were marketed as -100, -200 etc.
But to eliminate any confusion I guess the original customer designations were retained; ie, 21 for Pan Am, 38 for Qantas, etc.
Musang From United Kingdom, joined Apr 2001, 872 posts, RR: 6
Reply 7, posted (13 years 9 months 1 week 14 hours ago) and read 2425 times:
Hi PGF - the 707-200 was an increased thrust version with 15,800 lb P+W JT4s, which were basically the civil version of the J75 engine. First flown June 11 '59, into service Dec. 20 '59. Only customer was Braniff with 5, so they were -227s, one of which was crashed on a customer acceptance flight. No other interest because the airlines were happy to wait for the turbofan version while Braniff needed some short term that could deal with the hot and high conditions on their South American routes. The other 4 went to BWIA then various other operators before being broken up between '77 and '84.
Re. the customer suffix system, after 21 to 99 were used, 01 to 19 came next then the alphanumerics. A0 to Z9, then 1A to 9Z, then double letters, AA to ZZ eventually. Not all intermediate combinations are used, for instance its A0, A1, A3, A4, A6, no A2 or A5, which I believe means there once was a customer assigned code A2 (or whatever) who then cancelled.
B747skipper From , joined Dec 1969, posts, RR:
Reply 8, posted (13 years 9 months 1 day 4 hours ago) and read 2412 times:
Taking the 707s, Boeing originally adopted "20" as a generic (non airline assigned) type, i.e. a 707-320 (as compared to a 707-328 for Air France).
Later, with the 727 and later, their generic types where designated i.e. as 100, 200s etc... so it is assumed that "00" is Boeing customer designation as well for airplanes build after the 707s...
Note that the "airline customer designation" is remaining with airplanes, no matter which airline reallay takes first delivery... i.e., some 707-331 were build for TWA but sold and delivered to PanAm and later times many such situations occured, i.e.Varig took delivery of 747-2L5Bs intended for Lybia... yet Varig designator is "41"...